SUMMARY: The FAA is superseding an existing
airworthiness directive (AD) for McCauley Systems, Inc. propellers
that are installed on, but not limited to, BAE Systems (Operations)
Limited Jetstream Model 4101 airplanes. That AD currently requires
a one-time fluorescent penetrant inspection (FPI) of propeller
blade retention areas for cracks. This AD requires initial and
repetitive FPI or Ultrasonic Inspection (UT) of propeller blade
retention areas for cracks, replacement of high time propeller
blades, and a one-time inspection of propeller hubs. This AD is
prompted by four reports of significant cracks found in propeller
blade shanks since the issuance of AD 2003-15-01. We are issuing
this AD to prevent propeller blade failure or hub failure due to
cracking, which could result in failure of the propeller and loss
of control of the airplane.